resolve_device now prints each by-id candidate it scans, which entry
matched, and the resolved device path; the no-match error lists all
by-id entries with their targets. Camera startup logs the raw config
setting, resolved path, the node's sysfs name, the OpenCV version, and
the negotiated resolution. 'python3 camera.py' now dumps every detected
camera before opening, to troubleshoot machines where the wrong camera
gets used.
